body,::after,
::before {
  margin: 0;
  padding: 0;
    /*清除ios默认的点击时产生的高亮区块   rgba(0,0,0,0)*/
    -webkit-tap-highlight-color: transparent;
    tap-highlight-color:transparent;
    /*定义盒子模型定义的宽度从边框计算*/
    -webkit-box-sizing: border-box;
}
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
img {
  border: none;
  vertical-align: top;
}
a {
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
  color: #818788;
}
input {
 border:0;
 outline: none;
 resize: none;
 /*清楚ios浏览器默认的样式*/
 -webkit-appearance: none;
}


/* 框架搭建 */
html {
  width: 100%;
  height: 100%;
  overflow: hidden;
}
body {
  width: 100%;
  font-family: "Microsoft YaHei" , "sans-serif";
  font-size: 25px;
  line-height: 1;
  color: #333;
  position: relative;
  background: #f5f5f5;
}
/* 工具样式 */
.clearfix::after,
.clearfix::before{
    clear: both;
    content: '.';
    height: 0;
    line-height: 0;
    visibility: hidden;
    display: block;
}